This book is for those who are building an operating system, or want to start building one. This book takes you from the
first step to the last step to create a minimal multi-threading protected mode OS with a round-robin style task scheduler,
memory allocator, etc., as well as retrieving all the information you will need before the switch to protected mode.
This book is for those who want to start but have no idea where or how to do so. Full source code is included as well as
many utilities, all with source, to build your system.
It is designed so that once you have this minimal system up and running, you can then start adding all of the items you need
to make it a fully functional operating system. Part 2 contains an example of a more detailed memory allocator, just an
example on how to add to this operating system.
Chapter 11 gives an example of creating the link between the kernel and the devices and file systems attached.
The remaining books in this series explains in more detail these devices.

hey this book looks great. What is the OS langauge in the book C, or assembly and also if assembly is it fasm?

all with complete Assembly
Language source code.